*{
    margin: 0;
    padding: 0;
}
.w{
    width: 1200px;
    margin: 0 auto;
}
.fl{
    float: left;
}
.fr{
    float: right;
}
ul{
    list-style: none;
    text-decoration: none;
}
svg{
    width: 25px;
    height: 25px;
}